Realization of tunable microsphere resonators suspended in liquid via dielectrophoretic force

Author

Te-Chang Chen ; Tse-Jen Liao ; Lee, Ming-Chang M.

Author_Institution

Inst. of Photonics Technol., Nat. Tsing Hua Univ., Hsinchu, Taiwan

fYear

2015

fDate

4-6 May 2015

Firstpage

1

Lastpage

3

Abstract

A new control mechanism to realize tunable microsphere resonators suspended in liquid is proposed. Via adjusting the bias voltage across an inhomogeneous dielectric structure (a rib waveguide plus microsphere), the microsphere resonator is attracted and levitated on top of the single-mode rib waveguide via an repulsive dielectrophoretic (DEP) force, where the coupling gap between the microsphere resonator and the waveguide is precisely controlled. The tunable gap spacing is analyzed by calculating the dielectrophoretic force through Maxwell stress tensor.

Keywords

Maxwell equations; electrophoresis; micro-optics; microcavities; micromechanical resonators; radiation pressure; rib waveguides; tensors; Maxwell stress tensor; bias voltage; control mechanism; inhomogeneous dielectric structure; liquid suspended microsphere resonator; optoelectronic tweezer; repulsive dielectrophoretic force; rib waveguide plus microsphere; single mode rib waveguide; tunable microsphere resonator; Couplings; Force; Liquids; Optical resonators; Optical waveguides; Q-factor; Waveguide discontinuities; DEP; OET and WGM;

fLanguage

English

Publisher

ieee

Conference_Titel

Next-Generation Electronics (ISNE), 2015 International Symposium on

Conference_Location

Taipei

Type

conf

DOI

10.1109/ISNE.2015.7132037

Filename

7132037